Don't create a bunch of new matrices with hard to use names downstream in your code. Instead, simply reshape your matrix and then use indexing. E.g.,
CorBeam13 = reshape(CorBeam13,15,4096,[]);
Then downstream in your code, instead of S1, S2, etc., simply use CorBeam13(:,:,1), CorBeam13(:,:,2), etc.
If for some reason you really want them split up, you could convert them to a cell array of matrices with the mat2cell( ) function, which would still allow you to use easy indexing downstream in your code.
See this link:
